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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रebrary, Inc. Career Information and Resources for United Kingdom. [S.l.]: Going Global,lnc, 2004.
एमएलए (9वां संस्करण) प्रशस्ति पत्रebrary, Inc. Career Information and Resources for United Kingdom. Going Global,lnc, 2004.
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